Jimmy and John Oliver go head-to-head to prove their fast-thinking abilities by listing 10 things in various categories in 12 seconds or less.

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The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show, including comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives.

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Ten in Twelve with John Oliver | The Tonight Show Starring Jimmy Fallon
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